Fuel-feed means for oil burners



-c. UEBELMESSER v FUEL FEED MEANS FOR OILBURNERS Filed June 1. 1925YINVENTOR w v BY 7 7/10;

5 ATTORNEY Mada/Q Patented Aug. 17, 1926.

nsirso STATES CHARLES 'UEBEL'MESSEE, OJ? YORK, N. Y.

FUEL-FEED LVIEANS FOB OIL BURNERS.

Application filed June 1, 1925.

hf Y improvements relate to what may be designated as a preheatingpressure system for feeding liquid hydro-carbon fuel to burners of thetype set forth in my concurrent application Serial No. 722,220 filedJune 25th 1924:, in which vaporization is effected as a. preliminary tocombustion in a manner well known in a general way in the art as relatedto, the heating of steam boilers, and for analogous purposes, the objectof my present invent-ion being to attain more perfect combustion andcomplete utilization of the calorific value of the hydro-carbon oil usedas fuel. Heretofore it has been the practice in the art to preheat thefuel oil by means of apilot light to vaporize the oil preparatory to thestarting and operation of the burner, and a separate air pressure systemhas been essential to the fuel feed. My present improvement consists inthe provision of electric pro-heating means, and an automatic pressuresystem of fuel feed as hereinafter fully set forth,the inventionconsisting essentially in the specific combination and arrangement ofparts, devices and appurtenances described and claimed.

In the accompanying drawings I illustrate, diagrammatically, a practicalembodh ment of the essential features of my new system and apparatus asapplied to an oil burner of the type designated in my aforesaidconcurrentapplication Serial No. 722,- 220, although I do not limitmyself to the identical form, construction and arrangement of componentparts of the system shown by way of exemplification. since changes maybe made in minor details, and equivalent mechanical expedients resortedto with like results, and without departing from the spirit and intentof my invention in this respect. I

Referring particularly to the left hand portion of the diagram, whichshows a top view of a fuel oil burner of the character designated, B,represents the grate plate and.

Z Z the bars thereof. Interposed between the expansive vaporizingchamber V, and the check valve e and the source of liquid fuel supplya), is the serpentine coil pipe 0 extending in circular andsubstantially horizontalalignment above vand parallel to the said grateplate B, the preliminary vaporization of the liquid hydro-carbon fuelbeing effected in said coil Q2 and completed in the expansive vaporizingchamber V, pre- Serial No. 33,982;

paratory to the introduction of the resultant gas into the gratechamber, as fully set in said concurrent application, the novelty inthis connection in the present application, in so far as'the burner isconcerned, being the interposition in the said vaporizing coil '0 of anexpansive pressure chamber 3), connected by a. back pressure pipe p,with an oil supply tank S, 39 being a check valve interposed in saidback pressure pipe 2'), adjacent to the said tank S, and between it anda pressure reduction valve r, interposed in said back pressure pipe go,between said check valve 72 and the expansion chamber 29, said pressurereduction valve r, being connected by a pipe r with the lower portion ofthe tank S, as illustrated in theright hand portion of the saiddiagrammatic view, it being understood that the parts therein shownother than the burner B, and its immediate connect-ions are shown invertical plane, or substantially so, for convenience of exemplification.

Thus, I, represents a vertical sectional elevation of an initiatoryheating tank interposed between the supply tank S, and the burner B, apipe 2', in'whic'h is interposed a check valve 2", connecting the bottomof said initiatory heating tank I, with the bottom of the fuel supplytank '8, and the upper part of said initiatory heating tank I, beingpipe-connected with a pressuregauge i The induction end 4), of the fuelsupply pipe o,extends down axially into the said initiatory heating tankI, and is provided with a hand control valve o for regulating the amountof fuel .oil passing through the conduit 0, to the burner B, after thefuel feed'to the burner is started as hereinafter setforth.

2' is a bypass pipe connecting the upper part of the. initiatory heatingtank I, with the main extension of the fuel supply pipe 11", and havinginterposed in it a pressure checlevalvec' which yields to admit vaporunder pressure from the upper portion of the initiatory heating tank tothe burner supply pipe o, but counteracts back pressure from said burnersupply pipe o", to the initiatory heatingtank I.

Within the latter is positioned an electric resistance coil 6,interposed in an electric circuit of which the battery E, or othersource of electricity forms a part, 6, being a symbolic representationof aswitch of well known type controlling the circuit, in which latteris also interposed a spark plug 0 positioned with the area of the burnerB.

Normally the levels of liquid fuel in both supply tank S, and initiatoryheating tank I, are substantially identical owing to the gravity feedtherebetween. When it is desired to start fuel feed to the burner 13,the hand valve o is closed, cutting off temporarily the inductionextension 11, of the burner supply pipe 12, and the electric switch 6,is then closed. As a result, the resistance coil 6, in said initiatoryheating tank I, ra ses the temperature of the hydrocarbon oil therein,sufficiently to create vapor under pressure which escapes through thebypass 2' and check valve i into and through the burner supply pipe '0,to the burner B, where said initiator-y vapor escaping through theperforations in the grate bars I), Z), is ignited by the sparx plug 6after which the hand valve o may be opened, and the electric circuitopened also, by means of the switch 6. Under these conditions the feedof liquid fuel is then established through the inductive extension 1),of the burner supply pipe 4), through the latter to the preliminaryvaporizing coil v-, and thence to the expansive vaporizing chamber V,and its appurtenances in the burner B, as heretofore.

Vapor pressure incidentally existent in the auxiliary expansive chamber29, is transmitted through the back pressure pipe 79, to the space inthe fuel supply tank S, above the liquid level therein, to promote thefeed therefrom; and if this back pressure is excessive it is relieved bymeans of the pressure reduction valve 1", and pipe 1", communicatingwith the bottom of the supply tank S, without interference with thecontinuous normal feed to the burner B, through the medium of the pipe4, initiatory heating tank I, and feed pipe 4).

It will be seen that distinctive features of my present inventionconsist in the electrical pre-heating of the preliminary or pre paratoryfeed of fuel to the burner, and in the automatic pressure feed attainedby means of the auxiliary expansion chamber p, in the vaporizing coil 12as herein set forth, whereby preliminary vaporization and feed isestablished expeditiously and with certainty, and a continuous uniformfeed insured thereafter, dispensing with the necessity for thesupplemental air pressure system of feed heretofore resorted to.

What I claim as my invention and desire to secure by Letters Patent, is

1. Fuel feed means for an oil burner of the character designated,comprising a burner provided with a vaporizing cham ber and preliminaryheating coil connected therewith, an initiatory heating tank the lowerportion of which is pipe-connected with the lower portion of the mainoil supply tank, a burner feed pipe connected with the upper portion ofsaid initiatory heating tank and having an inductive end portionextending thereinto, a hand valve connected with said inductive portionof the burner feed pipe, a bypass pipe and pressure check valveinterposed between said burner feed pipe and the upper portion of thesaid initiator-y heating tank, an electric resistance coil in the latterand means for electrically energizing said resistance coil, for thepurpose and substantially in the manner set forth.

2. Fuel feed means for an oil burner of the character designated,comprising a burner provided with a vaporizing chamber and preliminaryheating coil connected therewith, an initiatory heating tank the lowerportion of which is pipe-connected with the lower portion of the mainoil supply tank, a burner feed pipe connected with the upper portion ofsaid initiatory heating tank and having an inductive end portionextending thereinto, a hand valve connected with said inductive portionof the burner feed pipe, a by-pass pipe and pressure check valveinterposed between said burner feed pipe and the upper portion of thesaid initiatory heating tank, an electric resistance coil in the latterand means for electrically energizing said resistance coil, togetherwith a spark plug positioned in said burner and in parallel electriccircuit with the electric resistance coil in said initiatory heatingtank, and a switch controlling said electric circuit, substantially inthe manner and for the purpose set forth.

3. Fuel feed means for an oil burner of the character designated,comprising a burner provided with a vaporizing chamher and a preliminaryheating coil connected therewith, an auxiliary expansion pressurechamber interposed in said preliminary heating coil, a back pressurepipe connecting said auxiliary expansion pressure chamber with the upperportion of the main oil supply tank, an initiatory heating tank thelower portion of which is pipe-connected with the lower portion of themain oil supply tank, a burner feed pipe connected with the upperportion of said initiatory heating tank and having an inductive endportion extending thereinto, a hand valve connected with said inductiveportion of the burner feed pipe, a bypass pipe and pressure check valveinterposed between said burner feed pipe and the upper portion of thesaid initiatory heating tank, an electric resistance coil in the latter,and means for electrically energizing said resistance coil, for thepurpose and substantially in the manner set forth.

4. Fuel feed means for an oil burner of the character designated,comprising a burner provided with a vaporizing chamber and a preliminaryheating coil connected therewith, an auxiliary expansion pressurechamber interposed in said preliminary heating coil, a back pressurepipe connecting said auxiliary expansion pressure chamber with the upperportion of the main oil supply tank, an initiatory heating tank thelower portion of which is pipe connected with the lower portion of themain oil supply tank, a burner feed pipe connected with the upperportion of said initiatory heating tank and having an inductive endportion extending thereinto, a hand valve connected with said inductiveportion of the burner feed pipe, a bypass pipe and pressure check valveinterposed between said burner feed pipe and the upper portion of thesaid initiatory heating tank, an electric resistance coil in the latter,and means for electrically energizing said resistance coil, togetherwith a spark plug positioned in said burner and in circuit with theelectric resistance coil in the said initiatory heating tank, and aswitch controlling said electric circuit, substantially in the mannerand for the purpose set forth.

5. Fuel feed means for an oil burner of the character designated,comprising a burner provided with a vaporizing chamber and a preliminaryheating coil connected therewith, an auxiliary expansion pressurechamber interposed in said preliminary heating coil, a back pressurepipe connecting said auxiliary expansion pressure chamber with the upperportion of the main oil supply tank, a pressure reduction valve and pipeconnecting said back pressure pipe with the lower portion of said mainoil supply tank, an initiatory heating tank the lower portion of whichis pipe connected with the lower portion of the main oil supply tank, aburner feed pipe connected with the upper portion of said initiatoryheating tank and having an inductive end portion extending thereinto, ahand valve connected with said inductive portion of the burner feedpipe, a bypass pipe and pressure check valve interposed between saidburner feed pipe and the upper portion of the said initiatory heatingtank, an electric resistance coil in the latter, and means forelectrically energizing said resistance coil, for the purpose andsubstantially in the manner set forth.

6. Fuel feed means for an oil burner of the character designated,comprising a burner provided with a vaporizing chamber and a preliminaryheating coil connected therewith, an auxiliary expansion pressurechamber interposed in said preliminary heating coil, a back pressurepipe connecting said auxiliary expansion pressure chamber with the upperportion of the main oil supply tank, a pressure reduction valve and pipeconnecting said back pressure pipe with the lower portion of said mainoil supply tank, an initiatory heating tank the lower portion of whichis pipe-connected with the lower portion of the main oil supply tank, aburner feed pipe connected with the upper portion of said initiatoryheating tank and having an inductive end portion extending thereinto, ahand valve connected with said inductive portion of the burner feedpipe, a by-pass pipe and pressure check valve interposed between saidburner feed pipe and the upper portion of the said initiatory heatingtank, an electric resistance coil in the latter, and means forelectrically energizing said resistance coil, together with a spark plugpositioned in the burner and in parallel electric circuit with theelectric resistance coil in the said initiatory heating tank, and aswitch controlling said electric circuit, substantially in the mannerand for the purpose set forth.

7. Fuel feed means for an oil burner of the character designated,comprising a burner provided with a vaporizing chamber and a preliminaryheating coil connected therewith, an auxiliary expansion pressurechamber interposed in said preliminary heating coil, a back pressurepipe connecting said auxiliary expansion pressure chamber with the upperportion of the main oil sup ply tank, a check valve in said backpressure pipe, a pressure reduction valve and pipe connecting said backpressure pipe with the lower portion of said main oil supply tank, aninitiatory heating tank, the lower portion of which is pipe-connectedwith the lower portion of the main oil supply tank, a check valveinterposed in said pipe connection, a burner feed pipe connected withthe upper portion of said initiatory heating tank and having aninductive end portion extending thereinto, a hand valve connected withsaid inductive portion of the burner feed pipe, a bypass and pressurecheck valve interposed between said burner feed pipe and the upperportion of the said initiatory heating tank, a check valve in saidburner feed pipe positioned adjacent to the burner, an electricresistance coil in said initiatory heating tank, and means forelectrically energizing said resistance coil, together with a spark plugpositioned in said burner and in parallel electric circuit with saidelectric re sistance coil in the initiatory heating tank, and a switchcontrolling said electric circuit, substantially in the manner and forthe purpose set forth.

CHARLES UEBELMESSER.

